Duplicating apparatus



May 31,1927. 3 ,395

E; LICHTENSTEIN DUPLICATING .QPPARATUS Fil ed Sept. 26. 1925 y %$\MIWWI y This invention relates to duplicating apoflice operator for 0 Patented May- 31, 1927.

UNITED STATES PATENT OFFICE-" EDMUND LIGHTENSTEIN, OF BERLIN, GERMANY, ASSIGNOR '10 DEUTSCHE MASCHIN ENIBAU- UND VERTBIEBS-GESELLSCHAFT M. B. 3., OF BERLIN, GERMANY, A FIRE.

DUPLICATING APPARATUS.

Application filed September 26, 1925, serial'no. 58,909, and in Germany October 29, 1924.-

paratus or the like particularly such as 1s provided with wiping or moistening and inking mechanisms and has for its primary object to provide against faulty operation thereof.

It has been found that in rotaryrubber printing mechanism wherein the rubber cylinder cooperates with a plate cylinderform cylinder-faulty o eration is not rarely produced by reason 0 the fact that the crating such printing devices is as a rule insufficiently skilled to effect the starting and stopping of the moistening and inking mechanisms on the form cylinder or in withdrawing it therefrom in the correct sequence.

According to the present invention this is remedied in that the moistening and inking mechanisms are connected or relatively locked by locking devices in such a manner that faulty manipulation is prevented.

In order that the invention may be more clearly understood and readily carried into efi'ect reference may now be had to the accompanying drawings .in which a preferred constructional form of the invention is illustrated and in which Fig. 1 shows a sectional elevation of a duplicating apparatus with the moistening and inking mechanisms in operativr position.

The Withdrawal of the inking mechanism from the cylinder a is effected by a hand lever 5, adapted toswing on the pivot is, and when moved in the direction of the arrow a cam surface l-thereon. acts against a pin m on the bearing plate a as clearly shown in Figs. 1 and 2. The lever 2' has two teeth or projections q or q, staggered peripherally as well as axially.

\Vhen the .lever i approaches the position shown in Fig. 2 a catch oypivotally mounted at n, moves under the action of a spring s or the like in the direction of the arrow in the dotted line position shown in Figure 2 and engages with its shoulder p under the tooth g .of the lever i so that the latter engaging a stationary pin 8 to normally re-' tain the moistening mechanism in the applied position, has been released.

If the moistening mechanism is swung back from the disengaged, dotted line, position, into the position in Fig. 1, then, as shown in Fig. 1, the point of the hook r strikes against the lower end of the catch 0 and disengages this so that the lever z can be moved into the. position shown in Fig. 1 and the inking mechanism applied.

This arrangement ensures that under all cannot be returned .to the position shown Fig. 2 shows a sectional elevation of the conditions the moistening mechanism a same duplicating machine in a different must be applied before the inking mecha- 35 a and adapted to bear thereagainst are moistening rollers a, forming the moistening mechanism, agams't which hear one or more cleaning rollers f. The rollers e and f are mounted upon a bearing plate 9 pivotall mounted at h and are therefore capa le of movement into contactwith or away from the form cylinder a.

nism with the result that the form cylinder is prevented from becoming dry.

The inking and moistening mechanism, however, are further inter-connected b a sector shaped memberv t which is pivote on the stationary pivot u and which co-operates with the parts g and 1'.

3 When the sector t is in the position shown in Fig. 1, its lower end en ages .over the hook 'rwhich cannot there ore be disengaged. This position occurs when the'proection q assumes the position as shown in Fig. 1. This indicates that the moistening mechanism e cannot be withdrawn when the inking mechanism is applied. Again this also ensures that theform cylinder a cannot become dry.

When however the lever i is moved downwardly from the osition in Fig. 1 into that in Fig. 2, i. e., i? the inking mechanism is withdrawn, the projection g raises the sec- .tor t bymeans of 1ts projection v into the osition in Fig. 2 in which it releases the 00k '1', which is now disengaged for the purpose of enabling withdrawal of the moistening mechanism e. -What I claim is 1. Duplicating apparatus comprising moistening mechanism. and inking mechanism and means for'preventing movement of the moistenin mechanism to inoperative position until after the inking mechanism has been so moved, as well as means for preventing movement of the inking mechanism to operative position until the moistening mechanism has been so moved, both mechanisms being ad'aptedto be so moved independently and free of compulsory connec-- tion by common engaging anddisengaging means.

2. Duplicatin apparatus comprising moistening -mec anism and inking mechanism and means for preventing movement of the moistenin mechanism to inoperative position until a er the inking mechanism has been so moved,as well as means for preventing movement of the inking mechanism -to operative position until themoistening mechanism has been so moved, both mechanisms being adapted to be so moved indepndently and free of compulsory connection by common engaging and disengaging means, both mechanisms blocking each other at an at mpt of Wrong manipulation.

3. D 'plicating apparatus comprising moistening mechanism and inking mechanism and means for preventing movement of themoistening mechanism to inoperative position until after the inking mechanism as been so moved, aswell as means for preventing movement of theinkingmechanism to operative position until the moistening .mechanism has been so moved, both mechanisms being adapted to be so.moved independently and free of compulsory connection y common engaging and disengaging means, the moistening mechanism after the inking mechanism has been moved to inoperative position being freely movable to such an extent as to expose fully its working surface.

4. Duplicatin apparatus comprising moistemng mec anism, inking mechanism and a pivoted catch co-operating with both of said mechanisms for preventing movement of said moistening mechanism into inoperative position until after the inking mechanism-has been so moved.

5. Duplicating apparatus comprising inking mechanism, moistening mechanism, a pivoted catch normally co-operating with the moistening mechanism to hold it in operative position and a handle for moving said inking mechanism having means for causing movement of said catch to release the moistening mechanism as the inking mechanismis moved to inoperative position.

6. Duplicating apparatus comprising inking mechanism, moistening mechanism, a

spring biased pivoted catch co-operating with said mechanisms permitting movement of said inking mechanism whilst the moistening mechanism is in operative position but preventing movement of said inking mechanism to operative position when the moistening mechanism has been moved to inoperative position.

7'. Duplicating apparatus comprising ink ing mechanism, moistening mechanism, a handle for moving said inking mechanism from operative to inoperative positions and vice versa, a spring biased pivoted catch cooperating with said mechanisms,- a second pivoted catch co-operating with said mechanisms means associated with said handle for moving said last mentioned catch to release said moistening mechanism when the inking mechanism is moved to inoperative position and means also associated with said handle for co-operating with said first mentioned spring biased' catch for preventing movement of said inking mechanism to operative position when is inoperative.

In testimony whereof I have signed my name to this specification.

EDMUND LICHTEN STEIN.

said moistening mechanism" 

